As I suspected.Yes, on a vertical line texture the two vertices are at the bottom of the texture, in the correct horizontal positions
Since it's an internal timing/sequencing issue, it would be very helpful to know that you have NET/Framework 3.5 or later. If you do a web search on "determine issue of NET/Framework", you'll find lots of instructions on how to check. If you don't have 3.5 or later, please update (you'll probably get 4.5) and try again.
When it worked fine for you. it wasn't working so well for me or others. The change I made seems to have fixed it for everyone else. That's why I'm suspicious of your version.I presume I have the correct NET Framework - it worked fine earlier.
Since I can't duplicate the issue and no one else is reporting it, it going to take a lot of coordination to resolve, so we need to check the fundamentals first.
Don


